Heralded amplification for precision measurements with spin ensembles

Abstract

We propose a simple heralded amplification scheme for small rotations of the collective spin of an ensemble of particles. Our protocol makes use of two basic primitives for quantum memories, namely partial mapping of light onto an ensemble, and conversion of a collective spin excitation into light. The proposed scheme should be realizable with current technology, with potential applications to atomic clocks and magnetometry.

3 pages, 1 figure

References in corpus (5)

• Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
• Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
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Cited by in corpus (6)

• Prospective applications of optical quantum memories
• Generating Entangled Spin States for Quantum Metrology by Single-Photon Detection
• Towards quantum state tomography of a single polariton state of an atomic ensemble
• Enhancement of nonclassical properties of two-mode squeezed vacuum state with postselected von Neumann measurement
• General approach of weak-to-strong measurement transition for Fock-state-based pointer states
• The negative probabilities and information gain in weak measurements